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DeepSeek-V4.1-Flash vs ERNIE 5.5 Flash Preview

DeepSeek-V4.1-Flash and ERNIE 5.5 Flash Preview are closely matched at 48.9 and 52.3 on the LLM Stats Score. DeepSeek-V4.1-Flash is 1.5x cheaper per token.

DeepSeek · Baidu · Updated for 2026

Which is better?

DeepSeek-V4.1-Flash and ERNIE 5.5 Flash Preview are closely matched on the overall LLM Stats Score at 48.9 and 52.3.

In the 6 individual benchmarks reported for both models, ERNIE 5.5 Flash Preview wins 4; this is a narrower head-to-head signal than the composite indexes.

On price, DeepSeek-V4.1-Flash is roughly 1.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

ERNIE 5.5 Flash Preview also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose DeepSeek-V4.1-Flash

  • cost matters — it's about 1.5x cheaper per token
  • you need open weights you can self-host or fine-tune

Choose ERNIE 5.5 Flash Preview

  • you value its reported benchmark strengths — it wins 4 of 6 exact shared results
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Nov 2026

At a glance

The differences that matter most.

DeepSeek-V4.1-Flash
DeepSeek
ERNIE 5.5 Flash Preview
Baidu
Core performance indexes
LLM Stats Score
48.9
#29
52.3
#13
Reasoning
46.9
#32
50.7
#12
Coding
38.6
#16
37.9
#20
Agents
36.6
#21
38.5
#11
Cost, coverage & limits
Benchmark wins
2 of 6
4 of 6
Input price
$0.22 / M
$0.28 / M
Output price
$0.66 / M
$1.13 / M
Context window
1,040,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
DeepSeek-V4.1-Flash
ERNIE 5.5 Flash Preview
Tool use
31.8#10
32.2#8
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

20 reported for DeepSeek-V4.1-Flash · 13 for ERNIE 5.5 Flash Preview

6 shared

DeepSeek-V4.1-Flash outperforms in 2 benchmarks (Agents' Last Exam, DeepSWE 1.1), while ERNIE 5.5 Flash Preview is better at 4 benchmarks (AutomationBench, Humanity's Last Exam (no tools, text-only), NL2Repo, Terminal-Bench 4.0).

ERNIE 5.5 Flash Preview shows notably better performance in the majority of benchmarks.

Thu Nov 12 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

DeepSeek-V4.1-Flash costs less

For input processing, DeepSeek-V4.1-Flash ($0.22/1M tokens) is 1.3x cheaper than ERNIE 5.5 Flash Preview ($0.28/1M tokens).

For output processing, DeepSeek-V4.1-Flash ($0.66/1M tokens) is 1.7x cheaper than ERNIE 5.5 Flash Preview ($1.13/1M tokens).

In conclusion, ERNIE 5.5 Flash Preview is more expensive than DeepSeek-V4.1-Flash.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Thu Nov 12 2026 • llm-stats.com
DeepSeek
DeepSeek-V4.1-Flash
Input tokens$0.22
Output tokens$0.66
Best providerFireworks
Baidu
ERNIE 5.5 Flash Preview
Input tokens$0.28
Output tokens$1.13
Best providerBaidu
Notice missing or incorrect data?

Model Size

Parameter count comparison

483.2B diff

DeepSeek-V4.1-Flash has 483.2B more parameters than ERNIE 5.5 Flash Preview, making it 172.6% larger.

DeepSeek
DeepSeek-V4.1-Flash
763.2Bparameters
Baidu
ERNIE 5.5 Flash Preview
280.0Bparameters
763.2B
DeepSeek-V4.1-Flash
280.0B
ERNIE 5.5 Flash Preview

Context Window

Maximum input and output token capacity

ERNIE 5.5 Flash Preview accepts 1,048,576 input tokens compared to DeepSeek-V4.1-Flash's 1,040,000 tokens. ERNIE 5.5 Flash Preview can generate longer responses up to 1,048,576 tokens, while DeepSeek-V4.1-Flash is limited to 393,216 tokens.

DeepSeek
DeepSeek-V4.1-Flash
Input1,040,000 tokens
Output393,216 tokens
Baidu
ERNIE 5.5 Flash Preview
Input1,048,576 tokens
Output1,048,576 tokens
Thu Nov 12 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

DeepSeek-V4.1-Flash supports multimodal inputs, whereas ERNIE 5.5 Flash Preview does not.

DeepSeek-V4.1-Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.

DeepSeek-V4.1-Flash

Text
Images
Audio
Video

ERNIE 5.5 Flash Preview

Text
Images
Audio
Video

License

Usage and distribution terms

DeepSeek-V4.1-Flash is licensed under MIT, while ERNIE 5.5 Flash Preview uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

DeepSeek-V4.1-Flash

MIT

Open weights

ERNIE 5.5 Flash Preview

Proprietary

Closed source

Release Timeline

When each model was launched

DeepSeek-V4.1-Flash was released on 2026-09-10, while ERNIE 5.5 Flash Preview was released on 2026-11-11.

ERNIE 5.5 Flash Preview is 2 months newer than DeepSeek-V4.1-Flash.

DeepSeek-V4.1-Flash

Sep 10, 2026

2 months ago

ERNIE 5.5 Flash Preview

Nov 11, 2026

1 days ago

2mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

DeepSeek-V4.1-Flash is available from Fireworks, DeepInfra, Novita. ERNIE 5.5 Flash Preview is available from Baidu Qianfan.

DeepSeek-V4.1-Flash

fireworks logo
Fireworks
Input Price:Input: $0.22/1MOutput Price:Output: $0.66/1M
deepinfra logo
Deepinfra
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M
novita logo
Novita
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M

ERNIE 5.5 Flash Preview

baidu logo
Baidu
Input Price:Input: $0.28/1MOutput Price:Output: $1.13/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against DeepSeek-V4.1-Flash and ERNIE 5.5 Flash Preview side-by-side, then vote on the output you prefer.

DeepSeek-V4.1-Flash
✓ Preferred
ERNIE 5.5 Flash Preview
Open in Playground

FAQ

Common questions about DeepSeek-V4.1-Flash vs ERNIE 5.5 Flash Preview.

Which is better, DeepSeek-V4.1-Flash or ERNIE 5.5 Flash Preview?

DeepSeek-V4.1-Flash and ERNIE 5.5 Flash Preview are closely matched on the LLM Stats Score at 48.9 and 52.3. DeepSeek-V4.1-Flash is made by DeepSeek and ERNIE 5.5 Flash Preview is made by Baidu. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does DeepSeek-V4.1-Flash compare to ERNIE 5.5 Flash Preview in benchmarks?

DeepSeek-V4.1-Flash scores CodeForces: 100.0%, GPQA: 90.9%, Terminal-Bench 2.1: 90.6%, BabyVision: 89.6%, CyberGym: 88.1%. ERNIE 5.5 Flash Preview scores BrowseComp: 87.4%, DRACO: 84.9%, MCP Atlas: 84.6%, DeepSWE 1.1: 71.2%, OfficeQA Pro: 67.9%.

Is DeepSeek-V4.1-Flash cheaper than ERNIE 5.5 Flash Preview?

DeepSeek-V4.1-Flash is 1.3x cheaper for input tokens. DeepSeek-V4.1-Flash costs $0.22/M input and $0.66/M output via fireworks. ERNIE 5.5 Flash Preview costs $0.28/M input and $1.13/M output via baidu.

What are the context window sizes for DeepSeek-V4.1-Flash and ERNIE 5.5 Flash Preview?

DeepSeek-V4.1-Flash supports 1.0M tokens and ERNIE 5.5 Flash Preview supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between DeepSeek-V4.1-Flash and ERNIE 5.5 Flash Preview?

Key differences include LLM Stats Score (48.9 vs 52.3), context window (1.0M vs 1.0M), input pricing ($0.22 vs $0.28/M), multimodal support (yes vs no), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes DeepSeek-V4.1-Flash and ERNIE 5.5 Flash Preview?

DeepSeek-V4.1-Flash is developed by DeepSeek and ERNIE 5.5 Flash Preview is developed by Baidu.

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